Abstract

Many optical models have been used to construct analytic composition-dependent dielectric functions of alloys. However, these models incorporate various unphysical assumptions to improve their fits to data. Here, we provide the parameters needed to calculate dielectric functions of for and by means of the parametric model of Johs et al. [Thin Solid Films313–314, 137 (1998)], which eliminates these problems. A representative example concerning interface analysis is discussed, where it is necessary to construct a dielectric function of an alloy of essentially arbitrary composition.

Received 29 November 2007Accepted 05 May 2008Published online 09 July 2008

Acknowledgments:

This work was supported by the National Research Laboratory Fund through Nano- Optical Property Laboratory and the Korea Science and Engineering Foundation through the Quantum Photonic Science Research Center.